Improvement in nut-locks



" r tentea'ma so. 1876.

9Q INgNTE:

ATTORNEYS.

I. VAN KURAN.

NUT-LOCK.

N, PETERS PHOTO-LITHQIRAPHEE WASHINGTON. D.

UNITED STATES PATENT OFFioEt IS AAC VAN KURAN, OF OMAHA, NEBRASKA.

IMPROVEMENT IN NUT-LOCKS.

Specification forming part of Letters Patent No. 178,090, dated May 30, 1876; application filed April 18, 1876. m

To all whom it may concern Be it known that I, ISAAC VAN KURAN, of Omaha, Douglas county, Nebraska, have invented a new and Improved Nut Look. of which the following is a specification:

My improved nut-lock consists of a washer of steel over a cavity in the fish plate, and surrounding the bolt, so that the pressure on the bolt on the fish-plate is transmitted to the surface of the plate surrounding the cavity by the washer, allowing of any required amount of pressure, and at the same time being a spring with sufficient reactionary power against the nut at all times to prevent it from becoming slack, so as to work off or unscrew.

Figure 1 is a side elevation of a rail joint with my improved nut-lock, and Fig. 2 is a transverse section taken on the line 00 00.-

Similar letters of reference indicate corresponding parts.

A is the spring-washer; B, the cavity in the fish-plate 0, over which the washer is arranged; D, the nut, and E thebolt.

A nut locked to its bolt by a springwasher,

A, over the cavity B of fish-plate U, as and for the purpose specified.

IsAAo VAN KURAN.

Witnesses GEO. W. HALL, F. O. BULLocK. 

